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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 943 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.39 × 98 =
  2. 2.40 × 98 =
  3. 3.3 × 19 =
  4. 4.19 × 98 =
  5. 5.5 × 29 =
  6. 6.3 × 29 =
  7. 7.3 × 99 =
  8. 8.8 × 49 =
  9. 9.4 × 19 =
  10. 10.9 × 9 =
  11. 11.14 × 19 =
  12. 12.3 × 19 =
  13. 13.14 × 19 =
  14. 14.4 × 29 =
  15. 15.14 × 19 =
  16. 16.39 × 99 =
  17. 17.11 × 98 =
  18. 18.21 × 98 =
  19. 19.22 × 98 =
  20. 20.5 × 99 =
  21. 21.12 × 19 =
  22. 22.12 × 9 =
  23. 23.7 × 19 =
  24. 24.8 × 29 =
  25. 25.3 × 98 =
  26. 26.3 × 9 =
  27. 27.8 × 9 =
  28. 28.3 × 9 =
  29. 29.12 × 49 =
  30. 30.13 × 29 =
  31. 31.9 × 49 =
  32. 32.10 × 49 =
  33. 33.9 × 49 =
  34. 34.12 × 29 =
  35. 35.9 × 49 =
  36. 36.5 × 29 =
  37. 37.13 × 9 =
  38. 38.7 × 29 =
  39. 39.5 × 49 =
  40. 40.5 × 49 =

Answer key

  1. 3822
  2. 3920
  3. 57
  4. 1862
  5. 145
  6. 87
  7. 297
  8. 392
  9. 76
  10. 81
  11. 266
  12. 57
  13. 266
  14. 116
  15. 266
  16. 3861
  17. 1078
  18. 2058
  19. 2156
  20. 495
  21. 228
  22. 108
  23. 133
  24. 232
  25. 294
  26. 27
  27. 72
  28. 27
  29. 588
  30. 377
  31. 441
  32. 490
  33. 441
  34. 348
  35. 441
  36. 145
  37. 117
  38. 203
  39. 245
  40. 245

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